Lawrence Livermore National Laboratory (LLNL) is near-completion of a quasi-monoenergetic neutron source for fast-neutron imaging. The source is expected to produce 10-MeV neutrons with an on-axis flux of ~1011 per second per steradian through a collimated aperture with a ~7-degree opening angle. The application for this source is imaging of low-Z materials heavily shielded by high-Z materials. We have tested the feasibility of the system at Ohio University. We have recently used the spallation source at the Los Alamos Neutron Science Center (LANSCE) to generate radiographic images. We will discuss our recent imaging data from LANSCE and compare them with prior data obtained using a quasi-monoenergetic source. We will also discuss our results as they relate to our expectations of the near-complete neutron source at LLNL.
*This work performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344